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feat: Add EvalState.require_attrs_names (sorted)

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(cherry picked from commit 0b1aca5a1ee7136e76a201477643cfc3acbf2676)
This commit is contained in:
Robert Hensing 2024-12-02 14:02:51 +01:00
parent 237a2281c1
commit 76b92a577d
1 changed files with 12 additions and 0 deletions
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12
rust/nix-expr/src/eval_state.rs
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@ -208,8 +208,20 @@ impl EvalState {
} }
unsafe { check_call!(raw::get_int(&mut self.context, v.raw_ptr())) } unsafe { check_call!(raw::get_int(&mut self.context, v.raw_ptr())) }
} }
/// Evaluate, and require that the value is an attrset. /// Evaluate, and require that the value is an attrset.
/// Returns a list of the keys in the attrset. /// Returns a list of the keys in the attrset.
///
/// NOTE: this currently implements its own sorting, which probably matches Nix's implementation, but is not guaranteed.
pub fn require_attrs_names(&mut self, v: &Value) -> Result<Vec<String>> {
self.require_attrs_names_unsorted(v).map(|mut v| {
v.sort();
v
})
}
/// For when [require_attrs_names] isn't fast enough.
/// Only use when it's ok that the keys are returned in an arbitrary order.
pub fn require_attrs_names_unsorted(&mut self, v: &Value) -> Result<Vec<String>> { pub fn require_attrs_names_unsorted(&mut self, v: &Value) -> Result<Vec<String>> {
let t = self.value_type(v)?; let t = self.value_type(v)?;
if t != ValueType::AttrSet { if t != ValueType::AttrSet {